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PTHREAD_SETSPECIFIC(3) FreeBSD Library Functions Manual PTHREAD_SETSPECIFIC(3)
NAMEpthread_setspecific -- set a thread-specific data value
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS#include <pthread.h>
intpthread_setspecific(pthread_key_tkey, constvoid*value);
DESCRIPTION
The pthread_setspecific() function associates a thread-specific value
with a key obtained via a previous call to pthread_key_create(). Differ-
ent threads can bind different values to the same key. These values are
typically pointers to blocks of dynamically allocated memory that have
been reserved for use by the calling thread.
The effect of calling pthread_setspecific() with a key value not obtained
from pthread_key_create() or after key has been deleted with
pthread_key_delete() is undefined.
The pthread_setspecific() function may be called from a thread-specific
data destructor function, however this may result in lost storage or
infinite loops.
RETURN VALUES
If successful, the pthread_setspecific() function will return zero. Oth-
erwise an error number will be returned to indicate the error.
ERRORS
The pthread_setspecific() function will fail if:
[ENOMEM] Insufficient memory exists to associate the value with
the key.
[EINVAL] The key value is invalid.
SEE ALSOpthread_getspecific(3), pthread_key_create(3), pthread_key_delete(3)STANDARDS
The pthread_setspecific() function conforms to ISO/IEC 9945-1:1996
(``POSIX.1'').
FreeBSD 10.2 April 4, 1996 FreeBSD 10.2